AD 75-09-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | Lockheed L-1011-385 Series Airplanes, Except Models L-1011-385-1-14 and L-1011-385-1-15 |
Unsafe Condition
Exceeding the go-around pitch limits during autopilot coupled go-arounds.
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Required Actions
Notify flight crews of Lockheed Operating Information Letter (OIL) 86 immediately. Install a placard stating 'Autopilot must be disconnected for go-around' within 48 hours. Replace AFCS Trim Augmentation Computer and both AFCS Pitch Computers with specified parts per Lockheed Service Bulletins 093-22-077 and 093-22-082 to remove the placard.
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Compliance Time
by the most immediate and practicable means (for notification), 48 hours after receipt (for placard installation), and through replacement of components as specified to remove the operating limitation.
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Affected Aircraft
Lockheed L-1011-385 series airplanes, except models L-1011-385-1-14 and L-1011-385-1-15, with Collins FCS-110 autopilot installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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